CN103800028B - Radiation imaging apparatus and its control method - Google Patents
Radiation imaging apparatus and its control method Download PDFInfo
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- CN103800028B CN103800028B CN201310472461.4A CN201310472461A CN103800028B CN 103800028 B CN103800028 B CN 103800028B CN 201310472461 A CN201310472461 A CN 201310472461A CN 103800028 B CN103800028 B CN 103800028B
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- 238000001514 detection method Methods 0.000 description 7
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure
- A61B6/544—Control of apparatus or devices for radiation diagnosis involving control of exposure dependent on patient size
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/46—Arrangements for interfacing with the operator or the patient
- A61B6/461—Displaying means of special interest
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1072—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring distances on the body, e.g. measuring length, height or thickness
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1079—Measuring physical dimensions, e.g. size of the entire body or parts thereof using optical or photographic means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
Disclose a kind of radiation imaging apparatus and its control method.The radiation imaging apparatus have a camera on the stand, and methods described produces the volume data of experimenter by the image of the experimenter by captured by camera, and based on experimenter volume data calculating the optimal dose of radiation.The radiation imaging apparatus include stand and the camera for shooting experimenter on stand.
Description
Technical field
It relates to for the radiation imaging apparatus to experimenter's radiation X ray, more particularly, being related to for using
Computer reconstruction passes through the signal of the X-ray of experimenter to form the radiation imaging apparatus and its controlling party of the image of experimenter
Method.
Background technology
X-ray imaging device is for experimenter's radiation X ray and analyzing through the X-ray of experimenter and being received with measuring
The device of the internal structure of examination person.As the various tissues for constituting experimenter have different degrees of X-ray transmission, therefore can
To use by entering to the internal structure of experimenter to the attenuation coefficient that different degrees of X-ray transmission is quantified and obtained
Row imaging.
X-ray imaging device can be classified as general x-ray system and use for radiation X ray in one direction
In radiation X ray in many directions and using the computed tomography of computer reconstruction image（CT）System.
With magnetic resonance imaging（MRI）System or ultrasonic system are different, radiation of the CT system using such as X-ray.Radiation is right
Human body is harmful to.Specifically, if causing human body to be excessively exposed to radiation to the radiation of human-body emitting high dose, infringement will be bright
Aobvious.
Accordingly, it would be desirable to a kind of radiation of the minimum dose of the image that experimenter can be obtained by irradiation is scanning experimenter
Technology.
The content of the invention
Therefore, it is an aspect of the invention to provide the radiation imaging apparatus that camera is provided with a kind of stand, the spoke
The volume data that imaging device is configured to the experimenter captured by the image generation camera of experimenter is penetrated, and based on tested
The volume data of person is calculating the optimal dose of radiation.
Additional aspects of the present invention will partly illustrate in the description that follows, and will be partly clear from description
, or can be known by putting into practice the present invention.
According to an aspect of the present invention, a kind of radiation imaging apparatus include：Stand；And camera, on stand, and
And be configured to shoot experimenter.
The radiation imaging apparatus can also include controller, and controller is configured to rotary stand, and revolves in stand
Camera is driven to shoot experimenter while turning.
Controller can control the driving of camera, make camera and clapped with predetermined regular time interval while stand rotates
Take the photograph experimenter.
Controller can control the driving of camera, make camera and received with predetermined regular angular shooting while stand rotates
Examination person.
The image of the experimenter that controller can be obtained while stand rotates from camera is producing the body of experimenter
Data.
Controller can calculate the optimal dose of radiation based on the volume data of the scanning area of experimenter.
The volume of experimenter can be divided into multiple volumes on the direction vertical with the power transmission shaft of stand by controller, obtain
Each center line for dividing volume is obtained, and adjusts the position of the center line of the division volume of the scanning area for including experimenter so that drawn
The power transmission shaft of the middle lines matching stand of partial volume.
Controller can be connected to each other to obtain in each division volume by the central point of the thin slice by volume is constituted
Line.
The radiation imaging apparatus can also include tiltable support, wherein, the inclination of controller adjusting bracket so that bag
Include the power transmission shaft of the middle lines matching stand of the volume of the scanning area of experimenter.
Multiple cameras can be arranged on stand in distance or angle interval at predetermined regular.
The radiation imaging apparatus can also include following controller, and the controller is configured to from by the plurality of phase
The image of the experimenter obtained by machine is producing the volume data of experimenter.
Camera can include infrared camera.
According to a further aspect in the invention, a kind of control method of radiation imaging apparatus includes：With on stand
Camera shoots experimenter；The image of the experimenter obtained from camera produces the volume data of experimenter；And based on experimenter's
Volume data is calculating the optimal dose of the radiation of the scanning area that will be irradiated experimenter.
The step of shooting experimenter can include：Rotary stand；And while stand rotates, drive camera shooting to receive
Examination person.
The step of while stand rotates driving camera to shoot experimenter can include：The driving of control camera, makes phase
Machine shoots experimenter with predetermined time interval while stand rotates.
The step of while stand rotates driving camera to shoot experimenter can include：The driving of control camera, makes phase
Machine is while stand rotates at a predetermined angle shooting experimenter.
The step of volume data based on experimenter calculates the optimal dose of the radiation of the scanning area that will be irradiated experimenter
Can include：The volume of experimenter is divided into into multiple volumes；Obtain each center line for dividing volume；Regulation includes experimenter's
The position of the center line of the division volume of scanning area so that the power transmission shaft of the middle lines matching stand of volume；And it is tested based on including
The volume of the scanning area of person is calculating the optimal dose of radiation.
The step of volume of experimenter is divided into multiple volumes can include：In the direction vertical with the power transmission shaft of stand
On the volume of experimenter is divided into into multiple volumes.
The step of center line for obtaining each division volume, can include：Obtain the central point of the thin slice for constituting volume；And
The center line of volume is obtained by the central point of thin slice is connected to each other.
Regulation includes that the position of the center line of the volume of the scanning area of experimenter causes the transmission of the middle lines matching stand of volume
The step of axle, can include：Adjust the inclination of the tiltable support for having experimenter of lying above so that including the scanning area of experimenter
Volume middle lines matching stand power transmission shaft.
According to exemplary embodiment, the dosage of radiation is adjusted by the volume data based on experimenter, experimenter can be prevented
It is exposed to the radiation of unnecessary high dose.
In addition, by after adjusting the position of center line of experimenter and causing the power transmission shaft of middle lines matching stand of experimenter
Scanning experimenter, can prevent experimenter to be exposed to the radiation of unnecessary high dose while the image of high-quality is obtained.
Description of the drawings
By description below in conjunction with the accompanying drawings to exemplary embodiment, these and/or the other side of the present invention will become
Understand and be easier to understand, wherein：
Fig. 1 is the computed tomography for illustrating exemplary embodiment of the invention（CT）The block diagram of device；
Fig. 2 illustrates the construction of the CT devices of Fig. 1；
Fig. 3 is the sectional view of the stand of the CT devices of Fig. 2；
Fig. 4 illustrates that the camera on the stand that installation figure 3 illustrates while stand rotates shoots the example of experimenter；
Fig. 5 is the sectional view of the stand of the CT devices of Alternative exemplary embodiment of the invention；
Fig. 6 illustrates that the multiple cameras on the stand of Fig. 5 shoot the example of experimenter；
Fig. 7 illustrates that the image from the experimenter obtained by the camera on stand obtains the volume data of experimenter
Example；
Fig. 8 illustrates that from the volume data of experimenter the body image for producing is divided into the example of multiple volumes；
The center line of each volume that Fig. 9 is illustrated in illustrating Fig. 8；
The method that Figure 10 illustrates the center line of each volume illustrated in forming Fig. 9；
The power transmission shaft of the center line and stand of each volume that Figure 11 is illustrated in illustrating Fig. 9；
The example that one of center line of volume that Figure 12 is illustrated in illustrating Fig. 9 is matched with the power transmission shaft of stand；
Figure 13 illustrates the tiltable support of the CT devices of exemplary embodiment of the invention；And
Figure 14 is the flow chart of the control method of the CT devices for illustrating exemplary embodiment of the invention.
Specific embodiment
Now, the exemplary embodiment of the present invention is reference will now be made in detail to, the example of these embodiments is shown in the drawings, its
In, similar reference number represents similar element all the time.In the following description, can save to known correlation function and
The detailed description of construction, to avoid unnecessarily obscuring subject of the present invention.However, the present invention can be with many multi-form realities
Apply and should not be construed as limited to exemplary embodiments set forth herein.In addition, with reference to defined in the function of the present invention
Described term can be differently implemented according to the intention and practice of user or operator here.Therefore, it should be based on
Disclosure in entire disclosure is understanding term.Without departing from the scope of the invention, can be in the crowd of change
Using principle of the invention and feature in many exemplary embodiments.
Additionally, although accompanying drawing represents the exemplary embodiment of the present invention, accompanying drawing is not necessarily drawn to scale, and in order to more
The present invention is clearly shown that and is illustrated, can exaggerate or omit some features.
Hereinafter, the radiation imaging apparatus of exemplary embodiment of the invention be will be described in detail with reference to the accompanying drawings.
Radiation is herein referred to（For example）Can send out when unstable radionuclide is converted into metastable nucleic
The particle penetrated or the energy of electromagnetic wave.The representative illustration of radiation includes X-ray, alpha ray, β rays, gamma-rays, neutron
Ray, infrared ray, luminous ray etc..Subsequently, by the exemplary embodiment of description, for the ease of description, radiation is here
Refer to X-ray；However, radiation is not limited to X-ray.
Meanwhile, the x-ray imaging device for the image inside experimenter is formed using X-ray is classified as general X and is penetrated
Linear system system, the dental X-ray system for checking oral cavity, for the breast of breast of scrutineer etc. according to target to be scanned
Camera chain, and x-ray imaging device can also be classified as with the general x-ray system of an angle scanning experimenter and
Experimenter is scanned at several angles and scanned image is combined into the tomoscan system of general image according to scanning angle
System.In following exemplary embodiment, for the ease of description, using computed tomography（CT）Device is as an example.
Fig. 1 is the block diagram of the CT devices 100 for illustrating exemplary embodiment of the invention, and Fig. 2 illustrates the CT devices of Fig. 1
Construction, and Fig. 3 is the sectional view of the stand of the CT devices of Fig. 2.
Hereinafter, CT devices 100 will be described structurally and operationally with reference to Fig. 1, Fig. 2 and Fig. 3.
Referring to figs. 1 to Fig. 3, CT devices 100 include：X-ray source 111, for producing X-ray and radiating to experimenter 30
X-ray；X-ray detector 120, for detection through experimenter 30 X-ray obtaining X-ray data；Camera 115, is used for
Shoot experimenter 30；Controller 141, for the body number of experimenter 30 is obtained from the image of the experimenter 30 captured by camera 115
According to, and the X-ray data obtained by X-ray detector 120 is rebuild, to form the image of experimenter 30；Driver 130, uses
In driving stand 103 and support 162；And display 142, for showing the image of experimenter 30 and/or being used to show optimal
The radiation of dosage, as described herein.
X-ray source 111 and X-ray detector 120 are installed on stand 103, with pre- according to being rotated in for stand 103
While determining rotate around experimenter 30 in angular range, to 30 radiation X ray of experimenter and detection through experimenter 30 X
Ray.
X-ray source 111 is included for producing the X-ray tube of X-ray, and is penetrated from external power source receiving power with producing X
Line.If applying high voltage to the anode and negative electrode of X-ray tube, thermoelectron is accelerated and is collided with the target of anode, with
Produce X-ray.The outer of stand 103 can be installed on stand 103 or is arranged on for producing high-tension generator
Portion.
Meanwhile, the energy of X-ray can be adjusted according to the tube voltage of x-ray source 111 is fed to by controller 141 for example
Amount, and the intensity or dosage of X-ray for example can be adjusted by controller 141 according to tube current and time for exposure.Can be with
Species, thickness or diagnostic purpose or experimenter according to experimenter 30 is by the species of the part of reception X-ray, thickness or examines
Disconnected purpose is determining the intensity or dosage of the energy and X-ray of X-ray.
X-ray source 111 can radiate homogeneous X-ray or heterogeneous x ray.If x-ray source 111 can be radiated with specific
The heterogeneous x ray of energy band, then the energy band of the X-ray for being radiated can be limited by upper and lower bound.
The upper limit of energy band can be adjusted or is adjusted by wave filter according to the size of tube voltage, that is to say, that institute's spoke
The ceiling capacity of the X-ray penetrated, and the lower limit of energy band can be adjusted by wave filter, that is to say, that the X-ray for being radiated
Least energy.Wave filter is used to only make the X-ray of the specific energy band through it pass through or filter.If x-ray source 111 includes using
In the wave filter of the X-ray for filtering low-energy zone, then can increase the lower limit of energy band, so as to improve the average of radiated X-ray
Energy.
X-ray detector 120 includes multiple detection modules, and this multiple detection module is arranged to have the pre- of detection module
The form of the array of setting shape or construction.X-ray of each detection module detection through experimenter 30, by the X-ray for detecting
Electric signal is converted into obtain digital X-ray data, and by digital X-ray data is activation to controller 141.
As shown in Figure 3, camera 115 is installed on stand 103, to shoot before to 30 radiation X ray of experimenter
Experimenter 30.Camera 115 shot experimenter 30 before scanning experimenter 30, and the image captured by camera 115 is sent
To controller 141, and controller 141 obtains the volume data of experimenter 30 using described image.
Camera 115 can be infrared camera, but camera 115 can shoot experimenter 30 to obtain experimenter 30
Any camera of digital information.
Controller 141 carrys out reconstruction image using the digital X-ray data sent by X-ray detector 120.Reconstruction image
Method can include iterative method, direct Fourier method, filtered back-projection etc..The image rebuild by controller 141 is by showing
Device 142 is exported；For example, the user of doctor, X-ray technology person etc. will be displayed to.
In addition, controller 141 can form the body of experimenter 30 using the image of the experimenter 30 captured by camera 115
Data.Controller 141 can be three-dimensional by multiple views as known in the art（3D）Figure captured by method for reconstructing from camera 115
As producing the 3D volume datas of experimenter 30.Selectively, if camera 115 is infrared camera, controller 141 is based on from receiving
The infrared ray of the reflection of examination person 30 measuring the distance of experimenter 30, and using experimenter 30 distance producing depth
Figure, so as to produce the volume data of experimenter 30.
Subsequently, by description using the image of the experimenter 30 captured by camera 115 producing the volume data of experimenter 30
Operation and using experimenter 30 volume data calculating the operation of the optimal dose of radiation.
Driver 130 includes the motor for driving stand 103 and for driving arm 162（For example）With will be tested
Person 30 moves to the motor inside or outside the hole 105 of shell 101, and as shown in Fig. 2 to Fig. 3, and controller 141 can
To control driver 130 to control the rotation of stand 103 and the movement of support 162.In addition, support 162 is configured to tiltable
, subsequently this will be described with reference to Figure 13.
Include x-ray source 111, X-ray detector 120 and camera 115 in which with reference to Fig. 2 and Fig. 3, CT device 100, and
And also include shell 101, support 162, trestle table 161 and work station 140, wherein, 101 bearing assembly of shell, support 162 are used for
Conveying lies in thereon or experimenter 30 disposed thereon, and the supporting support 162 of trestle table 161, work station 140 are used to show experimenter
30 image and receive for controlling the control command of the integrated operation of CT devices 100 from user.
Work station 140 includes display unit 142, and above-mentioned controller 141 can be included in work station 140.Such as
Shown in Fig. 3, work station 140 can include keyboard or other input units for receive user order.For example, display unit
142 can include touch-screen, and touch-screen is used to be shown as the graphic user interface used by the touch input of user command（GUI）.
Stand 103 can be included in shell 101, and x-ray source 111,115 quilt of X-ray detector 120 and camera
On stand 103.If experimenter 30 lies in or is located on support 162, support 162 is transported to by driver 130
Inside or outside the hole 105 formed in the central area of shell 101, and now, lie in or the experimenter on support 162
30 are conveyed together with support 162.Controller 141 controls driver 130, with the fed distance of adjusting bracket 162 so that tested
The test zone of person 30（That is, scanning area）In hole 105.
As shown in Figure 3, the x-ray source 111 and X-ray detector 120 in stand 103 is fixed to facing with each other, makes
Obtain X-ray detector 120 and can detect the X-ray from the radiation of x-ray source 111.When CT scan starts, driver 130 is to platform
Frame 103 provides revolving force, and if from x-ray source 111 to 30 spoke of experimenter while stand 103 is rotated around hole 105
X-ray is penetrated, then X-ray detector 120 detects the X-ray through experimenter 30.Controller 141 can be controlled by driver 130
The rotary speed and revolutions per minute of stand processed 103（rpm）.
Meanwhile, collimator 113 can be set at the front of the x-ray source 111 of radiation X ray or section, and collimate
Instrument 113 can adjust the width or cross-sectional area of the X-ray beam from the radiation of x-ray source 111.Therefore, collimator 113 is reduced not
Scattered ray on equidirectional, to reduce the computed tomography dose index with regard to experimenter 30（computed
Tomography dose index, CTDI）.In Alternative exemplary embodiment, can in the front of X-ray detector 120 or
Receive and another collimator is set at section so that only detect the X-ray from area-of-interest.In X-ray detector 120
The collimator arranged at front or reception section can eliminate scattered ray, and regulation through the X-ray beam of experimenter 30
Width or cross-sectional area, to determine the thickness of the volumetric flake of experimenter 30.
It is tested that Fig. 4 illustrates that the camera 115 on the stand 103 that installation figure 3 illustrates while stand 103 rotates is scanned
The example of person 30, Fig. 5 are the sectional views of the stand 103 of the CT devices 100 of Alternative exemplary embodiment of the invention, and
Fig. 6 illustrates that the multiple cameras 115 on the stand 103 of Fig. 5 scan the example of experimenter 30.
As shown in Figures 3 and 4, single camera 115 can be installed on stand 103.
If thus, being mounted with single camera 115, the controller 141 in Fig. 1 controls the driving of camera 115 so that
As shown in Figure 4 stand 103 around experimenter 30 for example with per turn 45 ° rotation while, camera 115 is with predetermined regular times
Interval or predetermined regular angular shoot experimenter 30.
As while stand 103 is rotated around experimenter 30, camera 115 is with predetermined regular time interval or makes a reservation for
Regular angular shoot experimenter 30, therefore the image of experimenter 30 with multiple angle shots can be obtained.
Fig. 4 illustrates that the view of the stand 103 illustrated in stand 103 is relative to Fig. 4 rotates 180 ° clockwise
While camera 115 0 °, 45 °, 90 °, 135 ° and 180 ° position shoot experimenter 30 operation.Rotate to 360 ° from 180 °
It is rotationally symmetrical with 180 ° illustrated in Fig. 4, therefore, save its detailed diagram.
The installation site of camera 115, shooting time or shooting angle are exemplary as shown in Figure 4.That is,
Camera 115 can be installed in another position on stand 103, and similarly, camera 115 can be tested with different angle shots
Person 30.
By shooting experimenter with predetermined regular time interval or predetermined regular angular while stand 103 rotates
30 and obtain experimenter 30 image show the experimenter 30 with different angle shots not ipsilateral image, and
Controller 141 constructs the 3D volume datas of experimenter 30 using described image.
As shown in Figure 4, when single camera 115 is installed on stand 103, need rotary stand 103 obtain with
The image of the experimenter 30 of different angle shots.In alternative embodiments, as shown in Figure 5, if multiple cameras 115 are mounted
The image of the experimenter 30 with different angle shots on stand 103, then can be obtained in the case of not rotary stand 103.
For example, can be defined as the quantity of camera 115 when stand 103 is manufactured can be in the feelings of not rotary stand 103
Shooting under condition produces the minimum number of the camera 115 of the image needed for the 3D volume datas of experimenter 30, and also can be by camera
115 installation site is defined as to shoot in the case of not rotary stand 103 needed for the 3D volume datas for producing experimenter 30
Image position.Armed with minimal number of camera 115 or more cameras, then can be in not rotary stand 103
In the case of obtain the image of experimenter 30 with different angle shots.
If the camera installed is less than minimal number of camera 115, stand 103 may be needed in predetermined angular range
Rotation.In this case, the predetermined rotation angle range of stand 103 can be less than the stand when single camera 115 is mounted with
103 rotation angle range.Selectively, it is possible to use imaging known in the art and 3D volume datas processing method are made to perform
With less than minimal number of camera 115 or using producing in off side or with the spaced camera of irregular angle 115
The step of raw 3D volume datas.
Fig. 5 illustrates that multiple cameras 115 are installed on stand 103 and allows to obtain in the case of not rotary stand 103
It is able to the state of the image of the experimenter of different angle shots.However, the quantity of the camera 115 illustrated in Fig. 5 or position are
Exemplary.That is, the camera 115 of varying number can be disposed in diverse location.
Fig. 6 illustrates multiple cameras 115 in the case of not rotary stand 103（For example, around the power transmission shaft c phases of stand 103
Every eight cameras of such as 45 ° of aturegularaintervals）Shoot the example of experimenter 30.
Fig. 4 illustrate while stand 103 is rotated around experimenter 30 camera shoot experimenter 30 for more than 115 times with obtain with
The example of the image of the experimenter 30 of different angle shots.In the alternate embodiment for installing multiple cameras 115 as shown in Figure 5
In, each camera 115 is disposable to shoot experimenter 30 without rotary stand 103, so as to obtain receiving with different angle shots
The image of examination person 30, as shown in Figure 6.
In this way, if camera 115 obtains the two dimension of the experimenter 30 with different angle shots（2D）View data, then
Controller 141 receives the 2D view data of experimenter 30, with using imaging as known in the art and 3D volume data processing methods
To produce the 3D volume datas of experimenter 30.
Fig. 7 illustrates the image of the experimenter 30 obtained when camera 115 is with different angle shot experimenters 30, and is based on
The image of experimenter 30 is producing the 3D volume datas of experimenter 30.
Controller 141 can be by multiple views 3D method for reconstructing as known in the art from the image captured by camera 115
To produce the 3D volume datas of experimenter 30.Selectively, if camera 151 is infrared camera, controller 141 is based on from tested
The infrared ray of the reflection of person 30 measuring the distance of experimenter 30, and using experimenter 30 distance producing depth map,
So as to produce the volume data of experimenter 30.
After the volume data for producing experimenter 30, controller 141 is based on the part of the scanning area including experimenter 30
Volume data scans the optimal dose of the X-ray needed for experimenter 30 to calculate.
Now, if body is based in the case of the build for not considering experimenter 30 or part thereof or other physical characteristics
Metrical information（Such as height or weight）The optimal dose of X-ray is determined, then can be radiated optimal needed for than being scanned
The X-ray of dosage higher doses.
If however, using the depth information or the body number of volume information of the part of the scanning area for including experimenter 30
According to calculating the optimal dose of X-ray, then compared to body measurement is only used in the case where the build of experimenter 30 is not considered
Information（Such as height or weight）To determine during the dose of radiation of X-ray, experimenter 30 can be prevented to be exposed to unnecessary height
The X-ray of dosage.
Meanwhile, according to research of the prior art, the stand illustrated in the center line of experimenter deviates Figure 11 to Figure 12
Axis（That is, the power transmission shaft of stand）When, CTDI increases.The research of prior art shows, if the center of experimenter with
The power transmission shaft of stand is at a distance of about 30mm, then CTDI increases 12% to 18%, and if the transmission of the center of experimenter and stand
Axle is at a distance of about 60mm, then CTDI increases 41% to 49%.Therefore, the stand by illustrating in Figure 11 to Figure 12 is made of the invention
Experimenter 30 is scanned after the center line of 103 power transmission shaft c matching experimenters 30, CTDI is reduced and is reduced experimenter 30 not
Radiation is exposed to necessarily.
Hereinafter, the power transmission shaft that stand 103 is made based on the volume data of experimenter 30 will be described with reference to Fig. 8 to Figure 13 in detail
The method of the center line of c matching experimenters 30.
Fig. 8 illustrates that from the volume data of experimenter 30 the body image for producing is divided into the example of multiple volumes, and Fig. 9 illustrates figure
The center line of each volume illustrated in 8, and the method that Figure 10 illustrates the center line of each volume illustrated in forming Fig. 9.Figure 11
The power transmission shaft c of the center line and stand 103 of each volume illustrated in illustrating Fig. 9, the center line of the volume that Figure 12 is illustrated in illustrating Fig. 9
One of the example that matches with the power transmission shaft c of stand 103, and Figure 13 illustrates the CT devices of exemplary embodiment of the invention
Tiltable support 162.
After the volume data that experimenter 30 is obtained as described above with controller described in Fig. 2 to Fig. 7 141, controller 141 will
The 3D body images of the experimenter 30 produced from the volume data of experimenter 30 are divided into multiple volumes as shown in Figure 8.In Fig. 8
In, with the V that irregularly can be shaped0To V6To represent each volume.That is, the present invention can make volume V0To V6Thickness
Degree or width are irregular or uneven, so as to be imaged to the relevant portion of experimenter 30 simultaneously.Selectively, volume V0Extremely
V6Thickness or width can be uniform or constant.
Volume can be divided based on the major part of body.For example, as shown in Figure 8, volume can be divided into head
Portion, breast and belly.Specifically, volume V0Can correspond to the other parts of brain or upper cranium；Volume V1Can correspond to
Mouth and/or throat；Volume V2Can correspond to upper arm, heart, lung, chest and breast area；Volume V3Can correspond to down
Arm, hand, trunk and/or abdomen area；Volume V4Can correspond to lower abdomen and genital area；Volume V5Can correspond to
The knee joint area of knee and surrounding；And volume V6Can correspond to following leg and foot areas.However, it is possible to thicker
Summary or more subtly division body image.
If division body image as illustrated in fig. 8, controller 141 calculates the center line of divided volume.In Fig. 9
In, with respectively with V0To V6Corresponding L0To L6To represent the center line of each volume.
The center line of each volume can be formed by the central point of each thin slice is connected to each other.In Fig. 10, use V2,1
To V2,nVolume V illustrated in Fig. 8 is constituted to represent0To V6Among volume V2Thin slice.As shown in Figure 10, by by thin slice
Central point be connected to each other to form volume V2Center line L2。
Due to constitute as shown in Figure 9 each volume thin slice shape or area can be with different, therefore each individuality
Long-pending center line can have different gradients.
The power transmission shaft c of the body image and stand 103 of the experimenter 30 that Figure 11 is illustrated in illustrating Figure 10, power transmission shaft c will be with
The parallel axis of the longitudinal axis in hole 105, power transmission shaft c are extended to outside the page of Fig. 6, the view in the hole 105 illustrated in Fig. 6.
For example, when the head of experimenter 30 is scanned as shown in Figure 11, the power transmission shaft c of stand 103 mismatch with it is tested
Corresponding volume V of head of person 300Center line L0。
As noted previously, as the center line of experimenter 30 is gradually deviated from the power transmission shaft c of stand 103, with regard to experimenter 30
The CTDI of X-ray significantly increase, so if mismatching experimenter's 30 in the power transmission shaft c of stand 103 as shown in Figure 11
Experimenter 30 is scanned in the state of center line, then experimenter 30 may be exposed to the X-ray of high dose.
Figure 12 illustrates the head of experimenter 30（That is, part to be scanned）Center line and stand 103 power transmission shaft c
The example of matching.
That is, for example, it is when the head of experimenter 30 is scanned as shown in Figure 12, corresponding with the head of experimenter 30
Volume V0Center line L0It is mobile, to match the power transmission shaft c of stand 103.
In order to make the center line L of experimenter 30 as shown in Figure 120The power transmission shaft c of matching stand 103, it is necessary to adjust experimenter
30 position so that head of the position of the foot of experimenter 30 higher than experimenter 30, and the whole body of experimenter 30 inclines
Oblique appropriate angle.
In an exemplary embodiment of the present invention, the position of adjusting bracket 162 as illustrated in fig. 12 so that volume V0's
Center line L0The power transmission shaft c of matching stand 103 is with scan volume V0.The scanning subsequently to each volume is performed in a similar manner, is made
Obtain volume V1Center line L1The power transmission shaft c of matching stand 103 is with scan volume V1, volume V2Center line L2The biography of matching stand 103
Moving axis c is with scan volume V2, etc..
Figure 13 illustrates the example of the various incline directions of support 162.
Such as Figure 13（a）Shown in, can incline in the vertical direction parallel to two horizontal faces of the support 162 of x-axis,
So that support 162 and experimenter 30 roll, and such as Figure 13（b）Shown in, parallel to two longitudinal directions of the support 162 of y-axis
End can also incline in the vertical direction, so that 30 pitching of support 162 and experimenter.In addition, such as Figure 13（c）Shown in,
Support 162 can be rotated on x/y plane clockwise or along counter clockwise direction, so that support 162 and experimenter 30
Deflect around z-axis.
Furthermore it is possible to combine carry out Figure 13's（a）、（b）With（c）In the operation that illustrates, with more subtly adjusting bracket 162
Position.Can realize that support 162 is illustrated in Figure 12 to Figure 13 according to methods known in the art using multiple motors
Various directions on inclination, this multiple motor controlled by controller 141.
When calculating includes the center line of volume of scanning area, the transmission of the center line and stand 103 of the identification volume of controller 141
Alternate position spike between axle c, is calculated based on the alternate position spike for being recognized in order that power transmission shaft c of the center line and stand 103 of volume
With and must be by the position adjustments of support 162 to what degree, and according to the degree for calculating controlling driver 130.
Driver 130 is according to the control command of controller 141 come the position of adjusting bracket 162 so that including scanning area
The power transmission shaft of the middle lines matching stand 103 of volume.
As with reference to described in Fig. 3 or Fig. 6, the image of the experimenter 30 captured by controller 141 from camera 115 is received to produce
The volume data of examination person 30, and when the volume data of experimenter 30 is produced, controller 141 is used and determines optimal agent based on volume data
The known technology of amount, in a manner known in the art based on volume data calculating the optimal dose of X-ray.Then, using meter
The X-ray of the optimal dose for calculating is scanning experimenter 30.Now, in order to reduce the CTDI of X-ray, by for volume V0Extremely
V6In each repeat tilt stand 162 and experimenter 30 as illustrated in fig. 12 and calculate using when power transmission shaft c is matched
Volume including scanning area of the X-ray of each dosage for going out scanning each volume, among the volume for constituting experimenter 30
Middle lines matching stand 103 power transmission shaft c in the state of, scan experimenter 30.
Figure 14 is the flow chart of the control method of the CT devices for illustrating exemplary embodiment of the invention.
Referring to figs. 1 to Figure 14, in step 300, as shown in Fig. 3 to Fig. 6, camera 115 shoots experimenter 30.Then,
In the step 310, as shown in Fig. 7 to Fig. 8, controller 141 produces the volume data of experimenter 30.In step 320, controller
The X-ray of 141 optimal doses that the scanning area that will be irradiated experimenter 30 is calculated based on the volume data of experimenter 30, and
Alternatively optimal dose is shown on display 142 in FIG.Then, in a step 330, as shown in FIG. 9 to 11, control
Device processed 141 calculates the center line of experimenter 30 based on volume data, and as shown in Figure 12 to Figure 13, makes the center line of experimenter 30
Power transmission shaft c with stand 103.The lines matching stand 103 in the controller 141 as shown in Figure 12 to Figure 13 makes experimenter 30
Power transmission shaft c when, in step 340, controller 141 using calculate correspondence divide volume X-ray optimal dose come
Each of scanning experimenter 30 divides volume, for experimenter 30 and/or experimenter 30 division volume producing scan image,
And scan image is shown on display 142.Then, the method for Figure 14 terminates.
Said apparatus of the invention and method can be realized with hardware or firmware or may be implemented as software
Or computer code or combinations thereof.Various assemblies（All controllers as described herein, CPU（CPU）, process
Device and any unit or device）At least include hardware and/or other physical arrangements and element.In addition, software or computer code
It is also stored in non-transient recording medium（Such as CD ROM, RAM, ROM（Regardless of whether erasable or rewritable）, floppy disk,
CD, DVD, memory chip, hard disk, magnetic-based storage media, optical record medium or magnetooptical disc）In, or computer code is
It is stored in downloading simultaneously by network on long-range recording medium, computer readable recording medium storing program for performing or non-transient machine readable media
And will be stored on local recording medium so that can be being deposited using all-purpose computer, digital computer or application specific processor
Storage this software on the recording medium, computer code, software module, software object, instruction, application, applet, should
With program etc. or with programmable or specialized hardware（Such as ASIC or FPGA）To show method described herein.As in this area
It will be understood that, computer, processor, microprocessor controller or programmable hardware include storing or receiving software or calculating
The volatibility and/or nonvolatile memory of machine code and memory subassembly（Such as RAM, ROM, flash memory etc.）, wherein, when
When computer, processor or hardware access and the execution software or computer code, the software or computer code realize this
Processing method described by text.In addition, it will be recognized that when all-purpose computer access for realize shown here process code
When, the execution of code is transformed into all-purpose computer for performing the special-purpose computer that shown here is processed.Furthermore it is possible to logical
Cross any medium（Such as by the signal of communication of wire/wireless linkup transmit）And its equivalent is with electrical way transmission procedure.
Program and computer readable recording medium storing program for performing can also be distributed in the computer system of networking so that computer-readable code with point
Mode for cloth is stored and is performed.
While there has been shown and described that several exemplary embodiments of the invention, but those skilled in the art should be managed
Solution, can be changed without departing from the principles and spirit of the present invention in these exemplary embodiments, the present invention
Scope limit in claims and its equivalent.
Claims (19)
1. a kind of radiation imaging apparatus, including：
Stand；
Camera, on stand and be configured to shoot experimenter；
Controller, is configured to from camera the image of experimenter that obtained to produce the volume data of experimenter,
Wherein, controller calculates the dosage of radiation based on the volume data of the scanning area for experimenter,
Wherein, controller calculates the center line of experimenter based on volume data, and makes the power transmission shaft of the middle lines matching stand of experimenter.
2. radiation imaging apparatus according to claim 1, wherein, controller rotary stand, and in the same of stand rotation
When drive camera shoot experimenter.
3. radiation imaging apparatus according to claim 2, wherein, controller controls the driving of camera, to rotate in stand
While shoot experimenter at predetermined intervals.
4. radiation imaging apparatus according to claim 2, wherein, controller controls the driving of camera, to rotate in stand
While with predetermined angle shot experimenter.
5. radiation imaging apparatus according to claim 2, wherein, controller is obtained from camera while stand rotates
Shooting experimenter image producing the volume data of experimenter.
6. radiation imaging apparatus according to claim 5, wherein, controller is on the direction vertical with the power transmission shaft of stand
The volume of experimenter is divided into into multiple volumes, each center line for dividing volume is obtained, and is adjusted the scanning for including experimenter
Each of area divides the center line of volume to match the power transmission shaft of stand.
7. radiation imaging apparatus according to claim 6, wherein, controller will be by constituting each thin slice for dividing volume
Central point be connected to each other obtain each divide volume center line.
8. radiation imaging apparatus according to claim 6, also include：Tiltable support,
Wherein, the inclination of controller adjusting bracket so that including the middle lines matching of each division volume of the scanning area of experimenter
The power transmission shaft of stand.
9. radiation imaging apparatus according to claim 1, wherein, camera includes being arranged on stand at predetermined distance intervals
On multiple cameras.
10. radiation imaging apparatus according to claim 9, wherein, controller from the plurality of camera obtained it is tested
The image of person is producing the volume data of experimenter.
11. radiation imaging apparatus according to claim 1, wherein, camera includes infrared camera.
A kind of 12. methods for controlling radiation imaging apparatus, including：
Experimenter is shot using the camera on stand；
The image of the experimenter obtained from camera is producing the volume data of experimenter；And
Based on the volume data of experimenter, calculating will be irradiated the dosage of the radiation of the scanning area of experimenter,
Wherein, the step of volume data based on experimenter, dosage of the radiation for calculating the scanning area that will be irradiated experimenter, wraps
Include：
The center line of experimenter is calculated based on volume data；And
Make the power transmission shaft of the middle lines matching stand of experimenter.
13. methods according to claim 12, wherein, using bag the step of the camera shooting experimenter being arranged on stand
Include：
Rotary stand；And
While stand rotates, drive camera to shoot experimenter.
14. methods according to claim 13, wherein, while stand rotates the step of driving camera shooting experimenter
Including：The driving of control camera, with while stand rotates at predetermined intervals shooting experimenter.
15. methods according to claim 13, wherein, while stand rotates the step of driving camera shooting experimenter
Including：The driving of control camera, with while stand rotates with predetermined angle shooting experimenter.
16. methods according to claim 12, wherein, the volume data based on experimenter is calculated and will be irradiated experimenter's
The step of dosage of the radiation of scanning area, includes：
The volume of experimenter is divided into into multiple volumes；
Obtain each center line for dividing volume；
Regulation includes that each of the scanning area of experimenter divides the center line of volume, to match the power transmission shaft of stand；And
Divide volume to calculate the dosage of radiation based on each of the scanning area including experimenter.
17. methods according to claim 16, wherein, include the step of the volume of experimenter is divided into multiple volumes：
The volume of experimenter is divided into into multiple volumes on the direction vertical with the power transmission shaft of stand.
18. methods according to claim 16, wherein, obtain each divide volume center line the step of include：
Obtain the central point for constituting each thin slice for dividing volume；And
Each center line for dividing volume is obtained by the central point of thin slice is connected to each other.
19. methods according to claim 16, wherein, regulation includes that each of the scanning area of experimenter is divided in volume
The step of line is to match the power transmission shaft of stand includes：Regulation is placed above the inclination of the tiltable support of experimenter so that bag
Include the power transmission shaft of the middle lines matching stand of each division volume of the scanning area of experimenter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0124564 | 2012-11-06 | ||
| KR1020120124564A KR101527812B1 (en) | 2012-11-06 | 2012-11-06 | Radiation imaging apparatus and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103800028A CN103800028A (en) | 2014-05-21 |
| CN103800028B true CN103800028B (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310472461.4A Expired - Fee Related CN103800028B (en) | 2012-11-06 | 2013-10-11 | Radiation imaging apparatus and its control method |
Country Status (4)
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| US (2) | US9131916B2 (en) |
| EP (1) | EP2727535B1 (en) |
| KR (1) | KR101527812B1 (en) |
| CN (1) | CN103800028B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101614704B1 (en) * | 2014-06-30 | 2016-05-02 | 한국전기연구원 | Early diagnosing apparaus and method of breast cancer |
| WO2016073841A1 (en) * | 2014-11-06 | 2016-05-12 | Siemens Medical Solutions Usa, Inc. | Scan data retrieval with depth sensor data |
| US11576645B2 (en) | 2015-03-02 | 2023-02-14 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for scanning a patient in an imaging system |
| US11576578B2 (en) | 2015-03-02 | 2023-02-14 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for scanning a patient in an imaging system |
| CN104644205A (en) * | 2015-03-02 | 2015-05-27 | 上海联影医疗科技有限公司 | Method and system for positioning patient during diagnostic imaging |
| DE102015204449A1 (en) * | 2015-03-12 | 2016-09-15 | Siemens Healthcare Gmbh | Method for determining an X-ray tube current profile, computer program, data carrier and X-ray image recording device |
| CN112884655A (en) * | 2015-08-14 | 2021-06-01 | 上海联影医疗科技股份有限公司 | Splicing acquisition method and system |
| KR102517824B1 (en) * | 2015-11-24 | 2023-04-04 | 주식회사 바텍 | X-ray imaging apparatus having multi x-ray sources and detectors |
| CN108013893A (en) * | 2016-11-03 | 2018-05-11 | 上海西门子医疗器械有限公司 | Ct apparatus with level altitude bed board |
| EP3351176B1 (en) * | 2017-01-23 | 2021-05-05 | Samsung Electronics Co., Ltd. | X-ray imaging apparatus and control method thereof |
| JP2020014801A (en) * | 2018-07-27 | 2020-01-30 | 株式会社日立製作所 | X-ray imaging device |
| CN110604579B (en) * | 2019-09-11 | 2024-05-17 | 腾讯科技（深圳）有限公司 | Data acquisition method, device, terminal and storage medium |
| EP4272652A1 (en) * | 2022-05-03 | 2023-11-08 | Koninklijke Philips N.V. | Patient/equipment positioning assistance by depth imaging |
| KR20240070912A (en) * | 2022-11-15 | 2024-05-22 | 주식회사 덴티움 | Radiation imaging apparatus |
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| DE10118183B4 (en) * | 2001-04-11 | 2005-06-23 | Siemens Ag | Röntengerät |
| DE102005028415A1 (en) * | 2005-06-20 | 2006-12-21 | Siemens Ag | Determining radiological thickness of object involves determining geometrical object thickness for defined through radiation direction from model measurement data, determining radiological thickness using at least one absorption parameter |
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| JP2002355243A (en) * | 2001-05-31 | 2002-12-10 | Hitachi Medical Corp | X-ray ct unit |
| AU2002322653A1 (en) | 2001-07-24 | 2003-02-17 | Case Western Reserve University | X-ray dose control based on patient size |
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| US6814489B2 (en) * | 2001-11-23 | 2004-11-09 | Ge Medical Systems Global Technology Company, Llc | 3D reconstruction system and method utilizing a variable X-ray source to image distance |
| WO2005032373A1 (en) | 2003-10-02 | 2005-04-14 | Philips Intellectual Property & Standards Gmbh | X-ray unit |
| KR100702148B1 (en) * | 2004-12-30 | 2007-03-30 | 한국전기연구원 | X-ray computed tomography apparatus to acquire the tomography and three-dimension surface image |
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| EP2130491B1 (en) | 2008-06-06 | 2015-08-05 | Cefla S.C. | Method and apparatus for radiographic imaging |
| JP2011143239A (en) * | 2009-12-14 | 2011-07-28 | Toshiba Corp | X-ray ct apparatus and control method thereof |
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2012
- 2012-11-06 KR KR1020120124564A patent/KR101527812B1/en active IP Right Grant
-
2013
- 2013-07-31 US US13/955,434 patent/US9131916B2/en not_active Expired - Fee Related
- 2013-10-11 CN CN201310472461.4A patent/CN103800028B/en not_active Expired - Fee Related
- 2013-10-17 EP EP13189054.3A patent/EP2727535B1/en not_active Not-in-force
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2015
- 2015-08-11 US US14/823,045 patent/US20150342555A1/en not_active Abandoned
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| DE10118183B4 (en) * | 2001-04-11 | 2005-06-23 | Siemens Ag | Röntengerät |
| DE102005028415A1 (en) * | 2005-06-20 | 2006-12-21 | Siemens Ag | Determining radiological thickness of object involves determining geometrical object thickness for defined through radiation direction from model measurement data, determining radiological thickness using at least one absorption parameter |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140126699A1 (en) | 2014-05-08 |
| KR101527812B1 (en) | 2015-06-10 |
| EP2727535B1 (en) | 2016-04-06 |
| EP2727535A1 (en) | 2014-05-07 |
| KR20140058045A (en) | 2014-05-14 |
| US9131916B2 (en) | 2015-09-15 |
| US20150342555A1 (en) | 2015-12-03 |
| CN103800028A (en) | 2014-05-21 |
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